LESSON 2
DESCRIBE AND IDENTIFY THE FOUR BASIC TYPES OF MICROPHONES-AND THE
MAINTENANCE PROCEDURES REQUIRED FOR PROPER OPERATIONS
TASK
Describe and identify the four basic types of microphones and the maintenance procedures required for
proper operation.
CONDITIONS
Given information and illustrations about terms relating to the four basic types of microphones and the
maintenance procedures required for proper operation.
STANDARD
Demonstrate competency of the task skills and knowledge by correctly responding to 80% of the
multiple-choice test covering terms relating to the four basic types of microphones and maintenance
procedures required for proper operation.
REFERENCES
None
Learning Event 1:
DESCRIBE AND IDENTIFY THE BASIC CONSTRUCTION OF THE FOUR BASIC TYPES OF
MICROPHONES
1.
Microphones. A microphone is a device which converts sound waves into an electrical signal,
and applies this signal to an amplifying circuit. Following sufficient amplification, the electrical signal
is used to drive a reproducer or to modulate a carrier frequency for transmission.
2.
General Characteristics. The general characteristics of the most widely used types of
microphones--dynamic, carbon, crystal, and capacitor--are discussed in this section. Each of these basic
types of microphones uses a specific fundamental principle of operation.
3.
Types of microphones. The basic operation of a microphone is dependent upon pressure of
sound waves. The angles at which the sound waves strike the diaphragm of a microphone depend upon
the positioning of the microphone in relation to the sound source. If the sound waves strike the
diaphragm at different angles the pressure is different, this will cause the microphone to be directional in
its frequency response. Most microphones are directional at
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